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(No Model.)

' H. VAN HOEVENBERGH.

PLATEN SHIFTING DEVICE FOR PRINTING TELEGRAPHS. No. 316,697. Patented Apr. 28,1885.

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Lia 100mm 5440c wboz FU'ERS. Fholu-bllwgnphcr, Washington D. C.

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HENRY VAN HOEVENBERGH, OF ELIZABETH, NEW JERSEY, ASSTGNOR TO 7 THE BALTIMORE & OHIO TELEGRAPH COMPANY, OF BALTIMORE, MD.

PLATEN-SHIFTING DEVlCE FOR PRINTING TELEGRAPHS.

SPECIFICATION forming part of Letters Patent N0.316,697 dated April 28, 18235.

Application filed August 7, 1884. (No model.)

To all whom it may concern.-

Be it known that I, HENRY VAN HOEVEN- BERGH, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Platen-Shifting Devices for Printing-Telegraphs, of which the following is a specification.

My invention relates to the class of devices employed in printing-telegraph instruments for effecting impressions from either of two type-wheels at the will of the transmittingoperator.

The object of the invention is to provide means for causing a single printing-platen to be moved into the plane of one or of the other of two type-wheels, accordingly as it is desired to print from one or the other of the same, through the instrumentality of a local battery, which battery also serves to actuate the pressmagnet of the instrument.

The invention consists in organizing the apparatus in substantially the following manner: Included within the main-line circuit is an electro-magnet the armature-lever of which is designed to complete the connections of a local battery through one or the other of two branch circuits. A local electromagnet is included in'one of these two branch circuits, and the armature-lever of this magnet is designed, when vitalized, to move the printing-platen from the plane of one type-wheel to that of the other. When the magnetization of this electro-magnet ceases, the platen is autom atically transferred to the plane of the first-named type-wheel through the agency of a retractile spring applied to the armature-lever of the electro-magnet. The second branch circuit leads through an artificial resistance approxi mately equal to that offered by the electromagnet, and these two conductors unite'with a third conductor leading through the pressmagnet. The circuit of the local battery will tric impulses of the character employed for actuating the eseapement device of the instrument the circuitcont-rolling lever is impelled rapidly to and fro, and the duration of the contacts which it makes is insufficient to vital- 55 ize either the platen-shifting magnet or the press-magnet. \Vhen, however, the lever is permitted to rest against either stop, the pressmagnet will be vitalized and an impression will be effected. If the lever be allowed to rest against the back contact-stop, the platen will remain in its normal position with reference to the planes of the two type-wheels; but if, on the other hand, the circuit-controlling lever is brought to rest against its front contactstop, the platen-shifting magnet will be vitalized and the platen will be moved before the press-lever has been actuated into position to print from the second type-wheel.

In the accompanying drawings, Figure l is a side elevation of such parts of a printingtelegraph mechanism as are necessary to illustrate my invention; and Fig. 2 is an end view, partly in section, showing the type-wheels and the platen-shifting device.

Referring to the figures, A represents the type-wheel shaft,upon which two type-wheels, B and B are carried. Ascape-wheel, O, is also applied to the shaft A, and an escape ment-anchor, D, is employed for controlling the movements of this scape-wheel, and thus of the type-wheels, in a manner well understood. The escapement-anchor is actuated by means of a polarized armature, c, which is applied to two electromagnets, E" and E", and these electro-magnets are included in the circuit of a main line, L.

Included in the main-line circuit, together with the electro-magnets E and E is another magnet, F, which is designed to control the circuit-connections of a localbattery, 0. The electro-magnet F is provided with an armature, f, carried upon a lever, f. A back contact-stop, g, and a front stop, are applied to the leverf. Onepole of the local battery 5 is connected through a conductor, 1, with the armature lever f. The other pole of this battery is connected by means of a conductor, 4, including the coils of an eleetro-magnet, H, which is employed for actuating a 1 mature-lever f, the back contact-stop of the same, the conductor 2, including the resistance r,-the conductor 4, including'the coils of the electro-magnet H, and thence to the battery. When, on the other hand, the armatare-lever is drawn toward the electro-magive stops'is insufficientto permit either the t F, the circuit will be from the battery through the armature-lever, the front con= tact-stop, thence through the conductor 3, in-

cludingthe coils of the electro-magnet K, to the conductor 4, including the electro-niag net H, and to the remaining pole of the bat-' tery. I11 whichever position'the armaturelever stands, the circuit will becompleted through the electro-magnet H, The armature-lever f is so adjusted that it will respond to the impulses normally employed 'foractuating the escapement-lever, and the duration of the contacts which it makeswith its-respectelectromagnet H or Kto become/vitali'zed; When, however, the armature-lever is permitted to rest in contact with either its front or 'back stop, then the circuit will be completed a 'sufficient length of time to vitalize the. electro-magnet H, and if the'circuit bev closed through the electromaguet K that magnet will also be vitalized. The resistance r is designed to equalxthat offered by the coils of the electromagnet K, and thus to render the, resistance of the two branch circuits substantially the same. 1 J

For the purpose of causing the armature-lever f "to rest against either its front or its back contact-stop, as may be desired, it is necessary :only to interrupt the'succes'sion'of impulses or to prolong theimpulse last transmitted,whether it be positive or negative. The interruption'of the impulses permits the circuit to be closed through the artificial resistance, where asa prolonged impulse causes the localcircuit to be completed through the'electro mag net K.

The electro-magnet H is employed for effect ing impressions from one or the other of the type-wheels, and for this purpose it is pro-- Vided-with an armature, h, carried upon a lever, h The extremity of the lever is forked,

as shown at h and it carries a movable platen,

1c. The platen is is supported. upon abar, k, which permits it to be moved from the plane of one of the type-wheels to the plane of the other.

- For the purpose of controllingthe position of the platen the elcctromagnet K is provided with an armature, is, carried upon a lever, The extremity of the lever it enters between two pins or projections, k and k extending from the bar 70. A retractile spring, 8', normally holds the lever 70 away from its electromagnet, and thus causes the platento stand beneath the type-wheel B. When, however, the electro-magnet K is vitalized, the armature-lever is drawn forward,'and it thus moves the'platen from the plane of the type-wheel B into the corresponding position with referenee to the type-wheel B 1 It will be understood, therefore, that the clectro-magnet H is vitalizedwhenever the lever f is permitted to rest in either of its two positions, and the press-lever is thereupon actuated. If thelever f rests against the stop g, an impression will be taken from the type-wheel- B. If, however, the lever be in its other position against the stop 9, the 'electro-magnet K will be vitalized, and the platen will be shifted into'the plane of the type-wheehB before the press lever has caused it to be carried into contact with either type-wheel, it being-understood that the electromagnet K responds more quickly than does the electro-magnet H.

For the purpose of interrupting the circuit of the local battery 0 when the instrument is not in operation, a switch, 25, may be placed in the conductor 2, or at any suit-able point in the circuit of the local battery. I

I claim as my invention 1. The combination, substantially as hereinbefore set forth, with a type-wheel and a type-wheel shaft of a printing-telegraph instrument, of an escapement device for the same, an armature-lever responding to the in 1- pulses employed for actuating said: escapement device, a local battery, two branch circuits which are alternately closed by the movements of said armaturelever, an electro-magnet included in one of said, branch circuits, a movable platen, and means, substantially such as described, for shifting said platen fromthe plane of one of said type-wheels to that of the other when said elcctro-magnet is vitalized. i 1

2. The combination, substantially as hereinbefore set forth, with two type-wheels, and means, substantially such as described,--for actuating the same, of an electro-magnea an armature applied to said elcctro-magnet, a front and. back contact-stop applied tosaid armature-lever, a, local battery, two branch circuits leading from said battery, the one or the other of which is completed accordingly as said armature-lever is or is not drawntoward its ielectro-magnet, a platen-shifting electro-magnet in one ofsaid branchcircuits, and a press-magnet included between saidbattery and said branch circuit.

3. The combination, substantially as hereinbefore set forth, with two type-wheels, and means, substantially such-as described, for revolving the same, of an electro-magnet responding to electric impulses of whatever polarity, a press-magnet, alocal battery, abranch conductor connecting one pole of said battery through said press-magnet, two branch conductors connected with said conductor, an armature and armature-lever applied to the firstnamed electro-magnet, two contact-stops applied to said armature-lever, with which said branch conductors are respectively connected, a movable platen applied to said type-wheels, a lever applied to said press-magnet, by which said platen is carried, a platen-transferring electro-magnet included in one of said branch conductors, and an armature and armaturelever applied to the last-named electro-magnet, whereby said platen may be caused to stand in the plane of one or of the other of said type-wheels, accordingly as said platentransferring magnet is'or is not vitalized.

4. The combination, substantially as hereinbefore set forth, of two type-wheels, an escapement device for permitting a step-bystep movement of the same, a polarized armature and two escapement magnets for actuating said device, an electro-magnet included in the circuit with the said escapement-magnets, an armature and armature-lever applied to the last-named electro-magnet, two contact-points for said armature-lever, two branch circuits, one or the other of which is completed accordingly as said armature-lever is in contact with one or the other of said points, a platentransferring electro-magn'et included in one of said branch circuits, and an artificial resist ance included in the other, an armature and armature-lever applied to said platen-transferring magnet, a movable platen applied to said type wheels, a mechanical connection, substantially such as described, between the last-named armature-lever and said platen, whereby said platen may be caused to stand in the plane of one or of the other of said typewheels, and means, substantially such as described, for impelling said platen toward said type-wheels.

5. The combination, substantially as hereinbefore set forth, of two type-wheels, an escapement device for permitting a step-by-step movement of the same, an electro-magnet included in the circuit of the main line, an armature and armature-lever applied thereto, two contact-points applied to said armature-lever, a local battery, two branch circuits from the same, one or the other of which is completed accordingly as said armature-lever is or is not drawn toward its electro-magnet, a platentransferring electro-magnet included in one of said branch circuits,and an artificial resistance included in the other, a movable platen applied to said type-wheels, a mechanical connection whereby said platen may be caused to stand in the plane of one or the other of said typewheels, accordingly as said platen transferring magnet is or is not vitalized, and a switch included in the circuit of said battery.

6. The combination, substantially as hereinbefore set forth, in a printing-telegraph instrument, of two type-wheels, and means, substantially such as described, for actuating the same, a printing-platen, and a press-magnet for actuating said platen, a platen-transferring electro-nlagnet, a local battery for vitalizing said platen-transferring and said press magnets, and means, substantially such as described, for completing the circuit of said battery either through said press-magnet independently of said platen-transferring magnet or through both of said magnets.

7. The combination, substantially as hereinbefore set forth, with two type-wheels, andmeans, substantially such as described, for actuating the same, of a movable platen, an electro-magnet for moving said platen, a local battery for vitalizing said electro-magnet, a press-magnet, and means, substantially such as described, for causing one or both of said electro-magnets to be vitalized by a current from said local battery when said type-wheels are brought to rest.

In testimony whereof I have hereunto subscribed my name this 26th day of June, .A. D. 1884.

HENRY VAN HOEVl l-NBERGH. LL. s]

Witnesses:

DANL. W. EDGECOMB, CHARLES A. TERRY. 

